Well ButBlue,...You are making quite a change going from the Pacifica to a Crossfire and there is no clear answer to your questions.
I drove several Crossfires before purchasing mine, and went thru several to find the quietest, best fit, finish and ride.
I have a Limited Coupe with Autostick and the Continental All Season Performance tires. Absolutely no wind noise and a beautiful car. Runs GREAT with plenty of power.
This car is not my daily driver (I love my 300M too) and I've never taken it out in winter weather (Ohio). It's pure fun to drive and has a high level of "ego emissions".
There is no spare tire and no room for one either. I've also installed the Eibach Pro lowering springs and find the ride and handling to be improved over the stock springs.
Mileage averages around 22 MPG.You can't rest your arm on the door or hang it out the window either.
Ask your dealer to let you take one for a day to test drive and decide if this is the car for you.
Good luck with your decision! This is the best Forum.